gallium: Add pipe cap for primitive restart with fixed index

Adds PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX which is a subset of the
primitive restart cap for when the hardware can only support the fixed
indices specified in GLES.

The switch statements were automatically modified with this command:

find \( \( -name \*.cpp -o -name \*.c \) \! -type l \) \
 -exec sed -i -r \
 's/^(\s*case\s+PIPE_CAP_PRIMITIVE_RESTART)\s*:.*$/\0\n\1_FIXED_INDEX:/' \
 {} \;

v2: Add a note in screen.rst

Reviewed-by: Eric Anholt <[email protected]> (v1)
Reviewed by: Erik Faye-Lund <[email protected]>

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5559>

3 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index 780377d6897..cee20003844 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -112,6 +112,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
    case PIPE_CAP_PRIMITIVE_RESTART:
+   case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
       return (eng3d->oclass >= NV40_3D_CLASS) ? 1 : 0;
    /* unsupported */
    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index 519d69047b3..3176164732a 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -191,6 +191,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
    case PIPE_CAP_PRIMITIVE_RESTART:
+   case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
    case PIPE_CAP_TGSI_INSTANCEID:
    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 9e8a3e5c3e3..d71307d0a95 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -231,6 +231,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
    case PIPE_CAP_PRIMITIVE_RESTART:
+   case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
    case PIPE_CAP_TGSI_INSTANCEID:
    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS: